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An interactive reference for guitar chord shapes, voicings and the theory behind them.

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  1. Chords
  2. /
  3. B
  4. /
  5. 9

B 9th (B9)

BRoot
D♯Maj 3
F♯Perf 5
Amin 7
C♯9

Rich and bluesy. Dominant 7 with added 9th. Common in jazz, blues, and R&B for sophisticated harmony.

Notes
BD♯F♯AC♯
Formula
1 · 3 · 5 · ♭7 · 9
Type
Extended chord
03

How to play it

EADGBe2133412345

B9

B 9th, 1fr

Bass
B, the root
Root
B
Strings
A D G B e · 1st fret
  • BRoot
  • D♯M3
  • F♯P5
  • Am7
  • C♯9

Up the neck

6 voicings, same five notes

Why a 9th chord sounds the way it does

B+4 fretsD♯+3 fretsF♯+3 fretsA+4 fretsC♯

Stacked from 4 intervals.

04

Where to go next

More B chords

Same root, other colours

Bmaj7B7Badd9B6Bsus2Bsus4Bmaj9B6/9

Chords in the key of B

What B9 usually sits next to

I · Bii · C♯miii · D♯mIV · EV · F♯vi · G♯mvii° · A♯°

Close relatives

Relatives of B major

  • G♯mRelative minor of B major
  • BmParallel minor, lower the 3rd

Other 9 chords

Same quality, every root

C9C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9B9
01

Root

B
02

Quality

9

5+ notes: stack the 9th, 11th or 13th on a 7th chord.

Why a 9th chord sounds the way it does

B+4 fretsD♯+3 fretsF♯+3 fretsA+4 fretsC♯

Stacked from 4 intervals.

03

How to play it

EADGBe2133412345

B9

B 9th, 1fr

Bass
B, the root
Root
B
Strings
A D G B e · 1st fret
  • BRoot
  • D♯M3
  • F♯P5
  • Am7
  • C♯9

Up the neck

6 voicings, same five notes
04

Where to go next

More B chords

Same root, other colours

Bmaj7B7Badd9B6Bsus2Bsus4Bmaj9B6/9

Chords in the key of B

What B9 usually sits next to

I · Bii · C♯miii · D♯mIV · EV · F♯vi · G♯mvii° · A♯°

Close relatives

Relatives of B major

  • G♯mRelative minor of B major
  • BmParallel minor, lower the 3rd

Other 9 chords

Same quality, every root

C9C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9B9
B 9th